Tax withholding trims IS&S (NASDAQ: ISSC) CEO stake by 906 shares

Rhea-AI Filing Summary

INNOVATIVE SOLUTIONS & SUPPORT INC Chief Executive Officer Shahram Askarpour reported a routine tax-related share disposition. On the vesting of restricted stock units, the company withheld 906 shares of common stock to cover his tax obligations.

The shares were valued at $16.26 per share for this purpose. After this withholding, Askarpour directly holds 495,035 shares of the company’s common stock, indicating that the tax-related disposition is small relative to his overall stake.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Askarpour Shahram

Role Chief Executive Officer

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock	906	$16.26	$15K

Holdings After Transaction: Common Stock — 495,035 shares (Direct, null)

Footnotes (1)

1. [object Object]

Key Figures

Tax-withheld shares: 906 shares Per-share value: $16.26 per share Post-transaction holdings: 495,035 shares +1 more

4 metrics

Tax-withheld shares 906 shares Withheld to satisfy CEO tax obligations

Per-share value $16.26 per share Value used for tax-withholding disposition

Post-transaction holdings 495,035 shares CEO’s direct ISSC common stock after withholding

Tax-withholding shares count 906 shares Reported as tax withholding in Form 4 summary

Key Terms

restricted stock units, tax obligations, tax-withholding disposition, Chief Executive Officer

4 terms

restricted stock units financial

"in connection with the vesting of restricted stock units."

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

tax obligations financial

"withheld by the issuer to satisfy the reporting person's tax obligations"

tax-withholding disposition financial

"transaction_action": "tax-withholding disposition""

A tax-withholding disposition is an event or transaction—such as selling or transferring securities, exercising options, or receiving compensation—that triggers a requirement to hold back part of the payment and remit it to tax authorities. It matters to investors because it reduces the cash they receive immediately and can change the timing and amount of taxable income, like a cashier taking a portion of your sale proceeds to pay taxes before you get the rest.

Chief Executive Officer financial

""officer_title": "Chief Executive Officer""

A chief executive officer (CEO) is the top leader of a company, responsible for making major decisions, setting goals, and guiding the organization’s overall direction. Think of the CEO as the captain of a ship, steering it toward success. Investors pay close attention to the CEO because their leadership and strategy can significantly influence the company's performance and future growth.

Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Askarpour Shahram

(Last) (First) (Middle)

C/O INNOVATIVE SOLUTIONS & SUPPORT, INC.

720 PENNSYLVANIA DRIVE

(Street)

EXTON PENNSYLVANIA 19341

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
INNOVATIVE SOLUTIONS & SUPPORT INC [ ISSC ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Executive Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/18/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	05/18/2026		F		906(1)	D	$16.26	495,035	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. These shares of common stock were withheld by the issuer to satisfy the reporting person's tax obligations in connection with the vesting of restricted stock units.

	/s/ Jeffrey DiGiovanni (attorney-in-fact)	05/20/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transaction did ISSC CEO Shahram Askarpour report?

ISSC’s CEO reported a tax-related share disposition. The company withheld 906 common shares to satisfy his tax obligations from restricted stock unit vesting, a routine non-market transaction that does not represent an open-market sale or purchase of shares.

How many ISSC shares were withheld for the CEO’s taxes?

A total of 906 ISSC common shares were withheld. These shares were used to cover Chief Executive Officer Shahram Askarpour’s tax obligations arising from the vesting of restricted stock units, according to the Form 4 filing and its accompanying explanatory footnote.

At what value were the withheld ISSC shares recorded?

The withheld ISSC shares were recorded at $16.26 per share. This price reflects the value used for calculating the tax-withholding disposition connected to the vesting of restricted stock units reported in the Form 4 insider transaction disclosure.

How many ISSC shares does the CEO hold after this Form 4 event?

After the tax-withholding disposition, the CEO holds 495,035 ISSC common shares directly. This figure shows his ongoing equity exposure to the company following the routine withholding of 906 shares for tax obligations on restricted stock unit vesting.

Was the ISSC CEO’s Form 4 transaction an open-market sale?

No, the transaction was not an open-market sale. The Form 4 and footnote state that ISSC withheld 906 shares to satisfy the CEO’s tax obligations on restricted stock unit vesting, which is a standard non-market tax-withholding mechanism.